Investments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2021
Debt and Equity Securities, FV-NI
Beginning balance		$ 73.6
New investments		45.0
(Decrease) increase in fair value of investments in equity securities		(9.2)
Foreign currency translation (losses) gains		(1.2)
Ending balance	$ 108.2	108.2
Subtotal
Debt and Equity Securities, FV-NI
Beginning balance		57.9
New investments		0.0
(Decrease) increase in fair value of investments in equity securities		(9.2)
Foreign currency translation (losses) gains		(1.6)
Ending balance	47.1	47.1
Investment in Equity Securities Level 1
Debt and Equity Securities, FV-NI
Beginning balance		53.8
New investments		0.0
(Decrease) increase in fair value of investments in equity securities	(17.2)	(19.8)
Foreign currency translation (losses) gains		(1.6)
Ending balance	32.4	32.4
Investment in Equity Securities, Level 2
Debt and Equity Securities, FV-NI
Beginning balance		4.1
New investments		0.0
(Decrease) increase in fair value of investments in equity securities	4.7	10.6
Foreign currency translation (losses) gains		0.0
Ending balance	14.7	14.7
Investments in Equity Securities, All Others
Debt and Equity Securities, FV-NI
Beginning balance		15.7
New investments		45.0
(Decrease) increase in fair value of investments in equity securities		0.0
Foreign currency translation (losses) gains		0.4
Ending balance	$ 61.1	$ 61.1

Equity Securities, FV-NI, Foreign Currency Translation Adjustments

No definition available.

Name:	gtls_EquitySecuritiesFVNIForeignCurrencyTranslationAdjustments
Namespace Prefix:	gtls_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

+ Details

Name:	us-gaap_EquitySecuritiesFvNi
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase (decrease) of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123583714&loc=SL75117360-209713

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3444-108585

+ Details

Name:	us-gaap_IncreaseDecreaseInEquitySecuritiesFvNi
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=gtls_EquityInvestmentsBeforeImpairmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: